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* Copyright (c) 2006 Jakub Jermar
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/** @addtogroup genarchmm
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* @brief This is the generic page hash table interface.
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#ifndef KERN_PAGE_HT_H_
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#define KERN_PAGE_HT_H_
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#include <arch/types.h>
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#include <synch/mutex.h>
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#include <adt/hash_table.h>
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#define PAGE_HT_KEYS 2
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#define PAGE_HT_ENTRIES_BITS 13
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#define PAGE_HT_ENTRIES (1 << PAGE_HT_ENTRIES_BITS)
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/* Macros for querying page hash table PTEs. */
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#define PTE_VALID(pte) ((pte) != NULL)
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#define PTE_PRESENT(pte) ((pte)->p != 0)
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#define PTE_GET_FRAME(pte) ((pte)->frame)
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#define PTE_READABLE(pte) 1
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#define PTE_WRITABLE(pte) ((pte)->w != 0)
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#define PTE_EXECUTABLE(pte) ((pte)->x != 0)
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extern as_operations_t as_ht_operations;
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extern page_mapping_operations_t ht_mapping_operations;
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extern mutex_t page_ht_lock;
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extern hash_table_t page_ht;
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extern hash_table_operations_t ht_operations;